Improvement in casings for window-pulleys



UNITE f STATES NATHAN THOMPSON, OF BROOKLYN, NEW YORK. l

Specification forming part o f Letters Patent No. 119,199, dated September 19, 1871; antedated September 2, 1871.

View thereof; and Figs. 5 and 6 longitudinal'and transverse sections of said shell or casing.

Similar letters of reference indicate correspondv ing parts throughout the several figures.

My invention consists in a novel construction of the box, shell, or casing for Window-sash and other pulleys by cutting and bending sheet metal so as to form out of one and the same piece both the supporting ends by which the casing is seated and secured to its place, the sides which carry the pivot or spindle of the pulley, and the guard that serves to keep the rope on the pulley. A pulley-shell or casing may thus be made with great rapidity and cheapness, is lighter and less liable to fracture than a cast-metal one, and has no riveting or fastening of detached parts together.

Referring to the accompanying drawing, A in Fig. 1, represents the blank as it rst appears when cutter stamped out of a plate of sheet metal, being made with ends a e, Which serve to form the supporting ends of the shell or case, and with side portions b b, which constitute the cheeks or sides thereof; also, having holes o c in it for the pivot or spindle of the pulley to fit or Work in, and with screw-holes d d for securing the case to its place. A, in Fig.2, shows the same blankbut with an elongatedlip porti on,e, stamped in it, which portion serves to form the guard that keeps the ropeon the pulley. This lip portion e may, if desired, be stamped or out in the blank at the same time that the latter receives its general coniiguration, shown in Fig. 1, and the holes c e and d d may be made in the blank at the saine time, or subsequently, as preferred. The blank A has its side portions b b then turned up or bent into parallel positions. with each other, as shown in Figs. 3, 4, 5, and 6, to form the cheeks ofthe casing, receiving the pulley with its spindle that take-s its bearings in the holes c c in between them. The lip portion e is also bent outward and in a suitable direction, or such shape given it as to make it Jform the guard which keeps the rope on the pulley, as also illusy trated in Figs. 3, 4, 5, and 6 of the drawing. The shell or casing is then Iinished ready for insertion of the pulley, or the latter with its spindle may be placed simultaneously with the turning up or bending ofthe sides b b.

The stamping or cutting of the blank and bending of it, as described, may be done by means of presses and suitable stamps, punches, and dies, or in any other desired manner.

What is here claimed, and desired to be secured by Letters Patent, is-

A pulley-shell or casing, constructed from a blank of sheet metal, cut, bent, and shaped to form the supporting ends, cheeks, and guard, substantially as specified.

NATHAN THOMPSON.

Witnesses R.V E. RABEAU, FRED HAYNEs. 

